java gzip压缩解压缩代码，javagzip压缩解压缩,java Gzip压缩实

java gzip压缩解压缩代码，javagzip压缩解压缩,java Gzip压缩实

java Gzip压缩实现代码

import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.GZIPOutputStream; public class CompressFileGZIP { private static void doCompressFile(String inFileName) {         try {             System.out.println("Creating the GZIP output stream.");             String outFileName = inFileName + ".gz";             GZIPOutputStream out = null;             try {                 out = new GZIPOutputStream(new FileOutputStream(outFileName));             } catch(FileNotFoundException e) {                 System.err.println("Could not create file: " + outFileName);                 System.exit(1);             }             System.out.println("Opening the input file.");             FileInputStream in = null;             try {                 in = new FileInputStream(inFileName);             } catch (FileNotFoundException e) {             System.err.println("File not found. " + inFileName);                 System.exit(1);             }             System.out.println("Transfering bytes from input file to GZIP Format.");             byte[] buf = new byte[1024];             int len;             while((len = in.read(buf)) > 0) {                 out.write(buf, 0, len);             }             in.close();             System.out.println("Completing the GZIP file");             out.finish();             out.close();         } catch (IOException e) {             e.printStackTrace();             System.exit(1);         }     }     /**      * Sole entry point to the class and application.      * @param args Array of String arguments.      */     public static void main(String[] args) {     String str="E:\\AUTORUN.INF";             doCompressFile(str);     } } 

java Gzip解压缩代码

import java.util.zip.GZIPInputStream; import java.io.FileOutputStream; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; public class UncompressFileGZIP {     /**      * Uncompress the incoming file.      * @param inFileName Name of the file to be uncompressed      */     private static void doUncompressFile(String inFileName) {         try {             if (!getExtension(inFileName).equalsIgnoreCase("gz")) {                 System.err.println("File name must have extension of \".gz\"");                 System.exit(1);             }             System.out.println("Opening the compressed file.");             GZIPInputStream in = null;             try {                 in = new GZIPInputStream(new FileInputStream(inFileName));             } catch(FileNotFoundException e) {                 System.err.println("File not found. " + inFileName);                 System.exit(1);             }             System.out.println("Open the output file.");             String outFileName = getFileName(inFileName);             FileOutputStream out = null;            try {                 out = new FileOutputStream(outFileName);             } catch (FileNotFoundException e) {                 System.err.println("Could not write to file. " + outFileName);                 System.exit(1);             }             System.out.println("Transfering bytes from compressed file to the output file.");             byte[] buf = new byte[1024];             int len;             while((len = in.read(buf)) > 0) {                 out.write(buf, 0, len);             }             System.out.println("Closing the file and stream");             in.close();             out.close();         } catch (IOException e) {             e.printStackTrace();             System.exit(1);         }     }     /**      * Used to extract and return the extension of a given file.      * @param f Incoming file to get the extension of      * @return <code>String</code> representing the extension of the incoming      *         file.      */     public static String getExtension(String f) {         String ext = "";         int i = f.lastIndexOf('.');         if (i > 0 &&  i < f.length() - 1) {             ext = f.substring(i+1);         }              return ext;     }     /**      * Used to extract the filename without its extension.      * @param f Incoming file to get the filename      * @return <code>String</code> representing the filename without its      *         extension.      */     public static String getFileName(String f) {         String fname = "";         int i = f.lastIndexOf('.');         if (i > 0 &&  i < f.length() - 1) {             fname = f.substring(0,i);         }              return fname;     }     /**      * Sole entry point to the class and application.      * @param args Array of String arguments.      */     public static void main(String[] args) {             doUncompressFile("E:\\AUTORUN.INF.gz");     } }